Door-check.



. No 781,551. I, PATE'NTED JAN. 31; 1905. M. A. QU.ILLIN. V

noon CHECK.

APPLICATION TILED JAN 30 1904.

Patented January 31, 1905.

PATENT OFFICE.

MARK A. QUILLIN, OFJASPER, MISSOURI.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 781,551, dated January31, 1905.

l Application filed January 30, 1904:. Serial No. 191,353.

T0 (1% whom, it may concern:

Be it known that I, 'MARK A. QUILLIN, a citi zen of the United States,residing at Jasper, in the county of Jasper and State of Missouri, haveinvented a new and useful Door-Check, of which the following is aspecification.

This invention relates to devices for application to swinging doors forchecking the movement at any desired point, and, has for its object toproduce a simply-constructed device of this character operative by therotation of the knob-spindle on the door.

With these-and other objects in View, which will appear as the natureofthe invention is better understood, the same consists in certain novelfeatures of construction, ashereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, andin which corresponding parts are denoted by like designating characters,is illustrated the preferred form of the embodiment of theinvention-capable of carrying the same into practical operation, itbeing understood that the invention is not necessarily limited thereto,as various changes in the shape, proportions, and general assemblage ofthe parts may be resorted to without departing from the principle orsacrificingv any of its advantages, and the right is therefore reservedof making all the changes and modifications which fairly fall within thescope of the invention and the claims made therefor.

In the drawings thus employed, Figure 1 is an edge view of a portion ofa door and the ad acent floor with the improvement applied,-

and Fig. 2 is a frontelevation of the same.

In the improved device herein disclosed is a bracket for attachment tothe door 11 near the floor 12 and preferably upon the inner face whenused upon outside doors and upon either face preferred when employedupon inside doors. The free end of the bracket is formed with spacedears,betwecn which two cam members 13 14 are pivoted eccentrically uponone 5 adjustable by a set-screw 20. The upper end common pivot-pin 15',the cams being reversely disposed. Attached pivotally to the cams arerods 16 17, extending upwardly and 'movably eonnected'to asleeve 18, thelatter having another rod 19 slidable therein and door, so as to partakeof the oscillatory mo' tion of the same. The sleeve 18 will be soadjusted upon the rod 19 that when the latchbolt is in itsprojected'position the cams 123 145 will be in their'depressedpositions, and then when the knob-spindle is rotated to withdraw thelatch-bolt it is obvious the corresponding movement of the crank-arm 21will elevate the cams and release them from contact with the floor. Itwill also be obvious that when the crank-arm is turned into its downwardposition a strong toggle-lever action will result, which willsimultaneously depress the cams, which-being reversely disposedwilleffectually prevent any movement of the door in either directionwhile they are in their elepressed position. The cams will preferably beprovided with shoes of rubber or similar material to increase their gripupon the floor and also to prevent abrasion of carpets or floors. 7

It will thus be seen thata very simply-constructed and effective deviceis produced operative entirely by the rotation of the knobspindles andby which means the door will be instantly checked in its movement inboth directions when the knobs are released. i

All the parts except the friction-shoes will be of metal and maybeplated or otherwise ornamented to present a pleasing appearance.

The device may be adapted to any size or form of swinging door. Havingthus described-the invention, what I claim is 1. The combination with adoorhaving a knob-controlled latch, of a pair of reverselydisposed camspivoted near the lower edge of the door" for frictional engagement with,the

floor, and means controlled by the door-knob for simultaneouslyelevating the cams out of engagement with the floor when the knob isrotated to release the latch and also to force the cams downwardly intoengagement with the floor upon the return movement of the knob.

2. The combination with a door having a knob-controlled latch, of a pairof reverselydisposed cams pivoted to the door near the lower edgethereof for engagement with the floor, a crank-arm carried by thedoor-knob spindle, and a rod connected to the crank-arm and also to thecams, whereby the latter may be simultaneously elevated and alsodepressed by rotative movements of the door-knob.

3. A door-check comprising a bracket for engagement with the door, apair of reverselydisposed floor-engaging cams pivotally supported uponthe bracket, a cranlearm provided with means for connection with thedoorknob spindle, and a rod connected to the crankarm and also to thefloor-engaging cams.

4. A door-check comprising a bracket for connection with the door, apair of reverselydisposed cams pivoted upon the bracket, a crank-armprovided with means for connection with the door-knob spindle, aconnecting-rod pivotally connected to the crank-arm, and links pivotallyconnected to the respective cams and also pivotally connected to therod.

5. A door-check comprising a bracket for connection with the door, apair of reverselydisposed floor-engaging cams pivotally carried by thebracket, a crank-arm provided with means for connection with thedoor-knob spindle, a connecting-rod pivotally connected to thecrank-arm, a sleeve slidably :uljustable upon the rod, a set-screwcarried by the sleeve to rigidly connect the latter to the rod, andlinks pivotally connected to the cams and also to the slidable sleeve.

6. In a door-check, a bracket for attachment to a door, tworeversely-disposcd cams movably connected to said bracket, an armconnected to the knob-spindle of the door and rotative therewith, a rodconnected to said arm and having a sleeve adjustable longitudinallythereon, and rods between said sleeve and cams, whereby the rotation ofsaid knob-spin- I MARK A. QUILLI N.

\Vitnesses:

J. M. Boo'rs, M. \V. BUSBY.

